Ejector system



EJECTOR SYSTEM Filed Feb. 6, 1922 2 Sheets-Sheet 2 INVENTOR.

Patented Jan. 6, 1925.

'^ ICE.

ROBERT'SUCZEK, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO C. H. WHEELEB.

MANUFACTURNG COMPANY, 01-? PHILADELPHIA, PENNSYLVANIA, A CORPOBA- TON OF PENNSYLVANIA EJECTOR SYSTEM.

Application filed February& 1322. Serial No. 534310.

To all whom z't may concern:

Beit known that' I, ROBERT Soczmne citizen of the United States, residing in the.

city and county of Philadelphia, State ot Pennsylvana, have invented =certain new and useful Improvements in Ejector Systems, of which the following isa specfication.

My invention relates to an ejector system utilizable in various relations, more particularly for the production and maintenance of vacuum in a steam condenser.

In accordance with my invention, ejector app-aratus, either single or multi-stage, has associated therewth an ejector, as an augmenter, for preliminarily raising the pressure of the air or elastic fluid to be compressed or ej ected through a, preliminary and generally small range of pressure, the motive fluid, as steam, for the augmenter ej ector being exhaust steam, such as may be derived from an auxiliary steam engine or turbine employed for driving auxiliary apparatus, as the pump for circulating the cooling water through the main. condenser or the condensate removed pump, or both.

Further in accordance with my invention, the augmenter ejector isof such capacity that it is Opel-able by the minimum amount of exheust steam available, and any eXcess exhaust steam is automatically diverted.

In accordance with my invention, the ejector system effects high economy as regards total steam Consumption in that the augmenter ejector by .employment of eX- haust steam raises the pressure at the suction of the principal ejector apparatus to such extent that the motive steain, generally live steam, employed in the principal ejector apparatus, required to raise the pressure of the :Lir or other elastic fluid to atmospheric pressure, more or less, is greatly lessened, whereby the over-all steam consumtion of the ejctor system is lessened.

My invention resides in the foregoing and further features hereinafter described and claimed.

For an illustration of one of the various forms my .inventon may take, reference is to be had to the accompanying drawings, in which:

Fig. l is a, side elevational view of apparatus embodying my invention.

tion, of the apparatus shown in Fig l.

Referring to the. drawings, .Cis the shell of the main condenser, into which. exhaust I steam, froma main steam engine orturbine, s delivered through the portD and s there-i in condensed by coming into contact with and passing between the condenser tubes va,

a few of which are indicated in Fig. %and through which cooling water is passed, .as

well understood` in connection with surface condensers. The cooling wateris supplied to the circulating pump A throughthe pipe,

b and discharged through the piper c into the lower compartment of the end'boxl from which it flows through the tubesa` off the lower group to the far end of the condenser C, and then returns through-the i upper group of tubes a to the upper'compartment e of the water box, from .which it is discharged through the pipe f.

The condensate of the condenser C collects in the hot well B connected, as by pipe g,

with the suction of the condensate-removal ,pump P and delivered therefrom through the pipe h.

The'pumps A and P are driven. by the turbine, engine or other steztm-driven motor T,

to which steam, as live steam, is `delivered through the pipe z' controlled by thetvalve V j, which is in turn controlled by the automatic centrifugal governor k through the.

lever m, pivoted at n, as well understood in the turbine art. the turbine T is delivered into 'the pipe o, which communicates with the pipe p deliver ing exhaust steam to the noZZle structure of the preliminary or augmenter ejector E, here indicated as a tubular ejector whose suction chamber q connects by pipe 7" with the interior of the condenser C with the space between the tubes a, thereof.

The total throat area of the expansion noz- Zle structure of the ejector E, and the ejector as a whole, is so proportioned that for the minimum amount of exhaust stem from the turbine T, air and' other uncondensed elastic fiud from the condenser C is raised in pressure to` small extent, as for example, about one to three inches mercury absolute pressure.

The motive fluid steam in mixture with the' air withdrawn from the condenser C is The eXhaust steam from,

discharged from the difi'user of the ejector E into the condenser or cooler F of any suitable character, here 'indicated as a surface condenser in general similar to the main condenser C in that it has tubes through which is circulated cooling medium entering the water box s at t and leaving the water box through the connection u. The cool mcdium for the condenser F may be derived froni any suitable source, as tor example, aforesaid ppe c supplied by the pump A. Orthe cooling medium may be condensatc from the main condenser C, in which case the cooling water system of the coudenser F may be connected in the system of the cooling Water systems of the condensers G and H hereinafter referred to. Or, and preferably, the cooling water for the condenser F may be the cold make-up water for the feed Water ot' the boiler or steam generators supplying steam to the engines or turbines which exhaust into the condenser C. The discharge from the ejector E passes around the tubes of the condenser F, and the steain is condensed and collects as condensate in.

the hot well e', from which it may he discharged to .any suitable destination, or, as ndicated, may be drawn through the pipe w into the hot well B or pipe g containing the condensate of the main condenser C.

In event exhaust steam supplied by the turbine T to the pipe 0 is .in eXcess of that required or utilizable by the ejector E, the pressure in the pipe 0 Will rise sufciently to open the check vaive 50, thereby allowing a portion ot' the exhaust steam to be hypassed around the ejector E through the pipe y into the condenser F, where it may be condensed separately from or in mixture with the discharge from the ejector Further means may be provided for diverting excess eXhaust steam from the ejector E, as by the va ve a, contrclling egress of eXhaust steam from the pipe o through the pipe a The valve a is pivoted at b and attached to the lever 0 which is biased by the springd tending to hold the valvc z open. In case the load upon the turbine T diminishes, as when the load upon either or both of the pumps A or P diminishes, and particularly when the load upon the pump l diminishes, as when the amount of steam entering the condenser C at D uiminishes, the turbine T will increase or tend to increase in speed, and the centritugal governor will move the upper end ot the lever m toward the right and partially close the valve 7' to diminish the supply ot motiv-e steam, and simultaneously the lever 0 of the valve .e will be moved in such direction in opposition to the spring d as to close or partially close the valve 2. Conversely, when the load upon the turbine T increases, it supplies a greater-amount of exhaust steam, and thu valve e may open and allow escape of any excess over that required by the ejector E or over that delivered to the ejector through the pipe p and past the check valvc x. lt will be understood that either ot the valves or .e may be omitted; or they may be used complementally, and that eli-1161711183 first respond to the first increment ot' ez-;cess eXhaust steam, and the other open upon further increase in the amount of exhaust steam.

The air and uncondensed elastic fluid is delivered from the condenser F through the pipes 6 to the suction chambers fi ot' the ejectors i ieach constituting a first stage ejector co-acting with a second stage ejector E The ejectors E may be of any suitable type, and are here indicated as tubular ejecters. Similarly, the ejectors E may be oi? any suitable type, and are here indicated as of the radial flow type, such, tor example, as

.disclosed in Letters Patent of the United States No. l,282,595.

Steam, as live steam, tor the ejectors E and E is delivered through pipes g controlled by valves ib the steam dividing, part being delivered to the radial expansion nozzles of ejectors and part being delivered through the ppes i to the nozzle strue tures of the ejectors E Each ejector TF discharges the air at still higher pressure in miXture with motive steam into one-halt of the condenscr i comprising groups ot tubes through which the discharge passes downwardly and then upwardly, the condensed steam or condensate being collected in the condensate-collecting chambers j froni which it is drawn ofi through the pipes 76 and pipe m to the hot well B or ecndensate pipe g' of the main condenser U. The air and uncondensed elastic fluid pass through the pipe n to the suction of the ejector E where they are raised still further in pressure and discharged in miziture with the motive steam through the pipe 0 into the surface condenser H, where they pass around the water conducting tubes, and the steam and other condensable vapors are condensed and the air discharged to atmosphere through the port 29 The condensate collects in the hot well .QI and is drawn through the pipe 7' and pipe m into the hot well B or condensate pipe g of the main condenser, or may be delivered to any other suitable or desired destination.

The cooling medium for the condenser G may be derived :from any suitable source, as may be that for the condenser H. As here illustrated, however, the condensate-removal pump P delivers the condensate from the main condenser, and such condcnsate as may be admiXed therewith from the condensers F, G, H, or any of them, through the pipe ?i into the cooling water space around the tubes of the condenser G, and thence through the pipe 8 to the cooling water box ?f of the surface condenser H, and is discharged therefrom through the pipe u to any suitable or desirable destination.

By the system described, the ejector or augmenter E, by employment or" exhaust steam, raises the air exhaustd from the condenser C from' a vacuum of 29 inches of mercury, more or less, to a vacuum' of 98 inches of mercury, more or less l`he air is then raised in succession by the ejectrs E and E through suitable greater steps of pressure 'change until the air reaches atmosphe'ric pressure or somewhat higher, or less than atmospheric pressure, as may be suitable or desirable.

By so employing the ejector E, the amount of live or high pressure motive steam employed by the ej ecto-rs E and E is materially or greatly economized, and economy is also etfected by employment of the condensers F, G and H, and particularly F and G, whereby the ej ector E is not required to compress the motive steam discharged by the ejector E, and the ejector E is not required to compress the motive steam discharged by the ejector E i The system as a whole effects efficiency in motive fluid consumption in' the' vacuumproducing ejectors, and the augmenter or preliminary ej ector E consumes only exhaust steam, which need be no more in quantity than the minimum delivered by the turbine or other motor T when running under its minimum load.,

Ehe pressure of the exhaust steam delivered through the pipe o to the ej-ector E may be, for example, from about three to five pounds above atmospheric pressure; while the live steam employed as the' motive fluid in the ejectors E and E may have a pressure from about seventy pounds upwards to one hundred flfty pounds, or higher, above atmospheric pressure. i

By so employing eXhaust steam to preliminarily raise the pressure of the air or other elastic fluid to be compressed through a small range of absolute pressure, 'though the ratio of compression of the ejector E is relatively great because, forexample, increasing the absolute pressure of the air to approximately double that magnitude, the amount of live or high pressure steam employed as the motive fluid in the ejectors "E and E is approximately halved, and this saving: is eflected by eXhaust steam of relatively small value for any other purpose.

lVith a pressure of about one inch mereury absolute in the condens-er C, if the ejector E increases that absolute pressure to two inches, the ratio of compression of ejector E is two. The ejectors E and E in series with each other then 'further raisethe pressure to atmospheric pressure, the ratio of compression of the combined ejeetors E and i E being then flfteen, and this ratio of compression may be divided between the two ejectors E and E as may be suitable' or de-' sii-able; it is preferred, however, that the ratio of compression of the ejector E be a greater than the ratio of compression of the ejector E Furthermore, 'it is preferred, as regards the ejectors E and E that their ratios of compression and motive steam consumptons be in accord with my prior Letters Patent No. 1,283,593.

While Ihave described ejector E as operable With a minimum amount of eXhaust steam delivered from the motor or turbine T, it. will be understood that ejec tor E may be of such size or Capacity as to use a greater amount of eXhaust steam, for example, an amount suffleient to cause the ejector E to have a ratio of compression greater than two, as, for example, three or more, in which case, with oneinch absolute pressure in the condenser G, the suction pressure of the ejector E Will be an absolute pressure of three inches of mercury.

It will be understood that While I have shown two ejeetors E and E in series after the ejector or augme-nter E, a single stage ejector may be employed in lieu of E and E for example, in lieu of a pair of serially connectedjejectors E and E there may be employed an ejector of the character disclosed n my prior Letters Patent No. 1,388,- 670. It Will be further understood that in lieu of either or both of the ejectorsE E there may beemployed a mechanical air pump or air pump of any other type, or a series 01"- them.

What I claim is:

1. An ejector system comprising an ejeetor employing as motive fluid low pressure or eXhaust steam, and a pair of ejeetors in series with each other and With said first named ejector employing as motive fluid iigh pressure steam. i

2. An ejector system for compressing elastic fluid from a pressure of approXimately one inch mercury'absolute to substantially atmospheric pressure, comprising an ejector employing eXhaust steam as motive fluid, ejectors serially related with each other and said ejector and employing high pressure motive fluid, and a condenser between said ejector and said first named ejeetors for condensing the motive steam from the mixture discharged by said first named ejector.

3. An ejector system for compressing elastic fluid from a pressureof approXimately one inch mercury absolute to substantially atmospheric pressure, comprising an ejector employing eXhaust steam as motive fluid, ejectors serially related With each other and said ejector and employingihigh pressure motive fluid, the ratio of compression o' said first named ejector beingapproximately two, and a condenser between said named ejector and said ejectors for coudensing the motive steam from the mixture discharged by said first named ejector.

4. An ejector system comprising an ejcctor employing as motive fluid low pressure or exhaust steam, and a pair of ejectors in series with each other and with said first named ejector employing as motive fluid high pressure steam, and a condenser between said first named ejector and the first of said pair of ejectors for condensing the motive steam from the mixture discharged by said first named ejector.

5. An ejector system comprising an ejector employing as motive fluid loW pressure or exhaust steam, a pair of ejectors in series with each other and With said first named ejector employing as motive fluid high pressure steam, and a condenser between the ejectors of said pair ?tor condensing the motive steam from the miXture dscharged by the first ejector of said pair.

6. An ejector system comprising an ejector employing as motive fluid low pressure or exhaust steam, a pair of ejectors in series with each other and With said first named ejector employing as motive fluid high presure steam, a condenser between said first ejector and the first ejector ot'. said pair;

and a second condenser between the ejectors of said pair, said condensers condensing` the motive fluid from the mixtures discharged thereinto.

7. An ejector system comprising an ejector employing as motive fluid low pressure or ez-:haust steam, a pair of ejectors in series With each other and With said first named ejector employing as motive fluid high pressure steam, the ratio of compression of said first named ejector being approximately two.

8. An ejector system comprising an ejector employing as motive fluid low pressure or eXhaust steam a pair of ejectors in series With each other and with said first named ector employing as motive fluid high pressure steam, the ratio of compression of said first named ejector being` approXimately two, and the ratio of compression of the first of said pair of ejectors being greater than the ratio of compression of the other ejector of said pair.

9. The combination with an ejector of a steam-operated motor, means for conducting steam exhausted by said motor to the nozzle structure of said ejector, a steam supply for said motor, a speed responsive governor operated by said motor and controlling the supply of steam to said motor, and a valve controlled by said governor controlling diversion of exhaust steam of said motor from said nozzle structure.

10. An ejector system comprising an ejector having nozzle structure utilizing low pressure or exhaust steam of predetermined amount, an air pump to which said ejector' delivers for further raising the pressure of the elastic fluid acted upon by said ejector a condenser intervening` between said ejector and said pump, and automatic means tor diverting from the nozzle structure or" said ejector into said condenser steam in excess of said predetermined amount.

11. An ejector system comprising an ejector having nozzle structure utilizing low pressure or exhaust steam oI" predetermined amount, an air pump to which said ejector delivers for further raisng the pressure oi"? the elastic fluid acted upon by said ejector, a condenser ntervening between said ejector and said pump, a connection from the steam supply to said condenser, and a valve operable upon occurrence of eXcess steam supply for diverting the excess steam from the nozzle structure of said ejeotor into said condenser.

12. The combination With an ejector, of a steam-operated motor means for conducting the steam eXhausted by said motor to the nozzle structure of said ejector, valve structure for diverting exhaust steam from saidnozzle structure, and means responsve to change of speed of said motor for causing said valve to move toward closed position.

13. The combination With an ejector, of a steam-operated turbine, means for Conveying steam eXhausted by said turbine to the nozzle structure of said ejector, an automatic governor controlling admission of steam to said turbine and valve structure controlled by said governor for diverting exhaust steam from the nozzle structure of said ejector. i

14. The combination With an ejector, of a steam-operated motor, means for conducting the steam exhausted by said motor to the nozzle structure of said ejector, valve structure for diverting eXhaust steam 'from said nozzle structure, means responsive to increase of speed of said motor for causing said valve to move toward closed position, and additional automatic meansresponsive to eXcess exhaust steam for diverting exhaust steam from the nozzle structure of said ejector.

i 15. The combination With an ejector, of a steam-operated turbine, means for Conveying steam eXhausted by said turbine to the nozzle structure of said eject'or, an automatic governor controlling admission of steamto said turbine valve structure controlled by said governor for diverting eX- haust steam from the noZzle structure of said ejector, and additional automatic means responsive to eXcess exhaust steam for diverting exhaust steam from the nozzle structure of said ejector.

16. The combination With an ejector, of a steam-'operated motor driving a variable load, means for conducting the steam eX- hausted by said motor to the nozzle structure of said ejector, said ejector Opel-able by the steam exhausted by said motor when its load is substantially a minimum, and automatic means for diverting :from the nozzle structure of said ejector excess steam exhausted by said motor when the load there of is substantially greater than said minimum load. y

17. The combination With a condenser, of a steam-operated motor driving the apparatus auxiliary to said condenser, and means for producing a Vacuum in said con denser comprising an ejector, and means `for c'onducting the steam exhausted by said motor to the nozzle structure of said ejector, said ejector being operable by substantially the minimum amount of steam exhausted by said motor corresponding substantially with the minimum amount of steam delivered to and condensed by said condenser.

18. The combination With a condenser, of a steam-operated motor driving the apparatus auxiliary to said condenser, an ejector and an air pump serially related therewith, and means' for conducting the steam eXhausted by said motor to the nozzle structure of said ejector, said ejector being operable by substantially the minimum amount of steam eXhausted by said motor corresponding substantially With the minimum amount of steam delivered to and condensed by said condenser.

19. The combination With a condenser, of a steam-operated motor driving the apparatus auxiliary to said condenser, and means for producing a vacuum in said condenser comprising an ejector, ;means for conducting the steam exhausted by said motor to the nozzle structure of said ejector, said ejector being operable by substantially the minimum amount 'of steam eXhausted by said motor corresponding substantially with the minimum amount of steam deliverecl to and condensed by said condenser, and means for automatically diverting excess steam exhausted by said motor.

20, The combinaton with a condenser of a steam-operated motor driving the apparatus auXiliary to said condenser, an ejector and an air pump Serially related therewith, means for conducting the steam eX- hausted by said motor to the nozzle structure of said ejector, said ejector being operable by substantially the minimum amount of steam exhausted by said motor corresponding substantially with the minimum amount of steam delivered to and condensed by said condenser, a condenser intervening between said ejector and said air pump, and means 'for diverting into said last named condenser eXcess steam exhausted by said motor,

21. The combinaton with a main condenser, of a steam-operated motor for driving the apparatus auxiliary to said. 'condenser means for producing a Vacuum in said condenser comprising an ejector and ejector apparatus -into which said ejector discharges, means tor delivering to the noz- Zle structure of said ejector steam eXhausted by said motor, said ejector being operable by substantially the mininum amount of steam exhausted by said motor corresponding with substantially minimum load upon said motor, and means for supplying high pressure steam to the nozzle structure of said ejector apparatus.

22. The combination With. a main condenser, of a steam-operated motor for driving the apparatus auxiliary to said condenser, means for producng a Vacuum in said condenser comprising an ejector and ejector apparatus into which said ejector discharges, means for delivering to the nozzle structure of said ejector steam eXhausted by said motor, said ejector being operable by substantially the minimun amount of steam exhausted by said motor corresponding with substantially minimum load upon said motor means for supplying high pressure steam to the nozzle structure of said ejector apparatus, and means for diverting steam exhausted by said motor in eXcess of said minimum amount.

23. The combination With a main condenser of asteam-operatedmotor for driving the apparatns auxiliary to said condenser, means for producing a Vacuum in said condenser comprising an ejector and ejector apparatus into which said ejector discharges, means for delivering to the nozzle structureof said ejector steam eXhausted by said motor, said ejector being operable by substantially the minimum amount of steam exhausted by said motor corresponding with substantially minimum load upon said motor, means tor supplying high pressure steam to the nozzle structure of said ejector apparatus, acondenser intervening between said ejector and said ejector apparatus, and means for diverting into said condensersteam exhausted by said motor in eX- cess of the amount utilized by said ej ector.

24. The combination with a condense'r, of a pump for removing` the condensate therefrom, a steam-operated motor for driving said pump, apparatus for producing a Vacuum in said condenser comprising an ejector, means for conducting to the nozzle structure ot' said ejector steam eXhausted by said motor, said ejector being operable by substantially the minimum amount of steam exhausted by said motor corresponding With substantially the minimum amount of steam delivered to said condenser, and automatic means for diverting steam eXhausted by said motor in eXcess of said m nimum amount.

25. The combination With a main condenser, oi a pump :tor removing the condensate therefrom, a steam-operated motor for lOU drving said pump, apparatus 'for producing a vacuun in said condenser comprising an ejector and an air pump in ser es therewith, means for conducting to the nozzie structure of said ejector steam exhausted by said motor, said ejector being operable by substantially the minimum amount of steam eXhausted by said motor corresponding with substantially the minimum amount of steam del'vered to said main condenser, a condenser between said ejector and said pump, and means for diverting into said last named condenser steam exhausted by said motor in eXcess of said minimum amount utilized by said ejector.

26. The combination with a ma n condenser, of a steam-operated motor driving the apparatus auxiliary to said condenser, means for producing a vaeuum in said condenser comprising serially connected ejectors, a condenser intervening between said ejectors, and a condenser into which the second of said ejectors discharges, a pump driven by said motor removing condensate from said main condenser and delivering it as cooling medium into said condenser into which the second ejector discharges, and means for conducting steam eXhausted by said motor to the nozzle structure of said first ejector.

27. The combination with a main condenser., of a steam-operated motor driving the apparatus auXiliary to said condenser, means for producing a vaeuum in said condenser comprising-serialiy connected ejectors, a condenser intervening between said ejectors, and a condenser into which the second of said ejectors discharges a pump driven by said motor removing condensate from said main condenser and delivering it as cooling medium into said condenser into which the second ejector discharges, means for conducting steam exhausted by said motor to the nozzle structure of said first ejector, and means for diverting into the condenser into which said first ejector discharges steam exhausted by said motor in eXcess of that required by said first named ejector.

28. The combination with an ejector, of an air pump in series therewith, condenser betweensaid ejector and said pump, means for delivering to the nozzle structure of said e ector low pressure or eXhaust steam, means for diverting into said condenser steam in excess of that required by said ejector, and means for efiecting condensation in said condenser by boiler feed water.

29. The combination with a main condenser, of a condensate pump therefor a steam-driven motor driving said pump, an eyector for withdrawing air from said condenser, means conducting steam exhausted by said motorto the nozzie structure of sai-d egector, a second ejector a condenser intervening between said ejector and said secor ejector, a thrd ejector, a condenser inte:- vening between said second and' third eyetors, and a condenser into which said th' ejector discharges, sad pump deiiver condensate of said main condenser to said last named condenser and the condenser intervening between said second and thiz-'d ejectors.

30. The combination with an ejector of an air pump in series therewith, a condenser between said ejector and said pump, means :tor delivering to the nozzle structure of said ejector low pressure or exhaust steam, and` means for effecting condensation in said condenser by boiler feed water.

731. The combination with an ejector, oi a steam-operated motor, means for conduct ing low pressure steam from said motor to the nozzie structure OI" saidejector, vah'c structure for diverting low pressure steam from said nozzle structure, and means responsive to change of speed of said motor for controlling said valve( 32. The combination with an ejector, oi' a steam-operated motor .means for conducting low pressure steam from said motor :e the nozzle structure of said ejector, a con denser into which said ejector discharges, and valve structure for diverting low pressure steam from said motor .into said con: denser.

33. The combination with an ejector, oi means for delivering to the nozzle structure thereof lowpressure steam, means for diverting from said nozzie structure low pressure steam in excess of that required by said eject or, and means for eft'ecting condensa tion of the diverted low pressure steam and the steam discharged by said ejector by make-up boiler feed water.

34. The combination with an ejectoi ot an air pump in series therewith, a condenser between said ejector and said pump, means for delivering to the nozzle structure of said ejector low pressure steam, means for diverting into said condenser low pressure steam in eXcess of that required by said ejector, and means for efiecting condensation of the diverted steam and the steam exhausted by said ejector by make-up boiier feed water.

35. The combination with an ejector, ot an air pump in series therewith, a condenser between said ejector and said pump, means for delivering to the nozzle structure cit saidejector low pressure steam, and means ;tor efiecting condensation' of the motive fluid of said ejector in said condenser by make-up boiler feed' water.

In testimony whereof I have hereunto atfiXed my signature this lst day of February ROBERT SUCZEK certificate of Correetion. i AV It is hereby Certified that in Letters Patent No. 1,522-,l55, granted January 6, 1925, upon the application of Robert Suczek, of Philadelphia, Pennsylvania, for an nnprovenent in Ejector Systems, an error appears in the printed specficaton requrng correction as follows: Page 3, line 117, clan 2, strike out the Words' first named and insert the same before the Word ejector in the same line and ela-im; and that the said Letters Patent should be read With this correction theren that the same may conforn to the record of the case n the Patent Ofice.

Signed and sealed this 28th. day of Aprl, A. D. 1925.

[SEAL] KARL FENNING,

Acting Commissioner' of Patents. 

